Chainsaw



FIG. 1 is a perspective view of a chainsaw;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is bottom plan view thereof.

The broken lines shown in the drawings represent portions of the chain saw that form no part of the claimed design. 

I claim the ornamental design for a chainsaw, as shown and described. 